package com.itheiam.springboot2condition.condition;


import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.type.AnnotatedTypeMetadata;
import redis.clients.jedis.Jedis;

import java.util.Map;

public class ClassCondition implements Condition {
    /**
     *
     * @param conditionContext 上下文对象,用于获取环境,IOC容器,Classloder对象
     * @param annotatedTypeMetadata 注解元对象 可以用于获取注解定义的属性值
     * @return
     */
    @Override
    public boolean matches(ConditionContext conditionContext, AnnotatedTypeMetadata annotatedTypeMetadata) {
        /*//1.需求:导入Jedis坐标后创建bean
        //2.思路:判断redis.clients.jedis.Jedis.class文件是否存在
        boolean flag = true;
        try {
            Class<?> acl = Class.forName("redis.clients.jedis.Jedis");
        } catch (ClassNotFoundException e) {
            flag = false;
        }
        return flag;*/

        //2.需求:导入通过注解值属性值value指定坐标后创建Bean
        //获取注解属性值 value
        Map<String, Object> map = annotatedTypeMetadata.getAnnotationAttributes(ConditionOnClass.class.getName());
        //System.out.println(map);  //{value=[redis.clients.jedis.Jedis]}
        String[] value = (String[]) map.get("value");

        boolean flag = true;
        try {
            for (String className : value) {
                Class<?> acl = Class.forName(className);
            }
        } catch (ClassNotFoundException e) {
            flag = false;
        }
        return flag;
    }
}
